IMCE is an unfortunately cryptic name for a very cool tool that lets ordinary business users easily transfer photos from their computers to pages within their Drupal-based website. (Let's just call it the "image tool" for the rest of this explanation). The image tool shows you the folders on your server just like Windows Explorer or Mac's Finder and lets you add new files, resize images or insert one into your web page. The tool has been around for a few years and Lucidus installs it with each website we build.
The reason we're pretty excited of late with the image tool is that a number of improvements to the interface have been made, making it WAY more intuitive to use. For example, we used to insert an image into the web page by clicking the image tool button, selecting an image and clicking "Send to TinyMCE." What the heck is TinyMCE? (see the end of this post to discover what TinyMCE stands for). :-) Now, the button has been relabeled to "Insert File". Simple changes make a big difference.
One very cool tidbit of additional information is where the upgrades have largely come from. The Obama Administration decided to leverage Drupal for http://whitehouse.gov when they took office and their web development staff have been contributing back to the open source community ever since. One of the things they've helped a great deal with is the image tool. BTW, who knew the President had a web development staff?
p.s. For those who care, TinyMCE is the rich text editor we include with Drupal sites that makes editing web pages as easy as writing an email. It also suffers from an unfortunately cryptic name.